The bathroom becomes the shower
A Eurobath—a shower without a threshold, door, or curtain—allows for the largest showering space within the standard bathroom footprints found in older homes. This type of shower is separated from the rest of the room visually rather than structurally. The continuous floor surface offers accessibility that will help homeowners to age in place.
While I believe this design can offer the most visual appeal, it is likely to be the most-expensive option. Instead of using a shower pan, a Eurobath relies on a full mortar bed that pitches the bathroom floor toward a drain to ensure adequate drainage (for more on this, read A Sloping Floor for a Barrier-Free Bath from Fine Homebuilding Issue #185 (Feb/March 2007), pp.50-55). As there are no curbs or enclosures to keep water inside the shower, the bathroom becomes a wet room. The walls, then, need to be protected with at least a tile wainscot. I’ve found that shelving and storage compartments of acrylic, glass, or stainless steel are good alternatives to wood, which can deteriorate because of excessive moisture.Use a porcelain pedestal sink rather than a vanity, and store towels and toilet paper away from the shower area.
I usually place a built-in bench in the shower. If the shower isn’t greater than 48 in.long, a bench opposite the showerhead allows you to sit in the spray. Corner benches save space, and they can serve as footrests for shaving and as storage for soaps and shampoos. When there are two opposing showerheads, a bench centered along the wall in between is another option.